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博碩士論文 etd-0806116-125748 詳細資訊
Title page for etd-0806116-125748
論文名稱
Title
八極發電機運作之分析
Analysis on the operation of an 8-pole AC generator
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
60
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2016-07-20
繳交日期
Date of Submission
2016-09-06
關鍵字
Keywords
定子、能量轉換效率、八極發電機、磁滯曲線、轉子
stator, rotor, hysteresis, efficiency of power, 8-pole electric generator
統計
Statistics
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中文摘要
本論文透過產學合作所製作的八個定子皆非均線的八極發電機的量測,藉由一部三相四極的電動機作為此發電機的驅動使發電機作用,並量測其電動機所消耗之電能及發電機所產生之電能,藉以計算出本發電機的轉換效率,並改變不同馬力及轉速的電動機驅使本發電機量測其所損耗的電能與產生的電能,計算出轉換效率並比較之間的差異,且同時量測其發電機內部溫度,得知此八極發電機的工作溫度維持在攝氏30度,因此再將製作發電機內部結構的材料進行磁性分析,確定該材料的磁滯損耗確實很小,導致整體運作上溫度不會大幅提升,也因此發電機的運作不會因為溫度的上升而降低其運轉效率,並使用LCR meter量測此發電機在靜止的狀態下,各極線圈的電感值。
選定其能產生最高效率的電動機,並使之帶動發電機,使用不同的勵磁方式與接上不同的負載,量測本發電機所輸出的電壓和電流與時間的關係波形,並藉由波形的分析,得知此發電機內部的轉子鐵芯與定子鐵芯之間的作用關係,並藉由電壓與電流的量測,計算出在運作時發電機內部定子的八組線圈的阻抗值,並探討此阻抗與發電機運作之間的關係。
Abstract
This thesis work investigated on an 8-pole electric generator consisted of stator coils wound into 8 poles with the ratios of their numbers of turns in sequence of 1:8:3:4:9:2:7:6. This makes the
sums of the coils in opposite poles in multiples of 10, while the 4 trio-sets of neighboring coils,
namely, (8, 3, 4), (4, 9, 2), (2, 7, 6), (6, 1, 8) all have total number of turns in multiples of 15.
The generator was driven by a motor when in operation and testing was set up for simultaneous
digital data acquisition of each pole, recording their voltage and current responses in each coil as
a function of time as rotor rotates, all conducted in synchronization. Since the windings are
rotationally asymmetric, the electric generation follows some sophisticate nonlinear response
functions. The coils are connected in parallel with pole 1, 8, 3, 4 to one electrode and 9, 2, 7, 6 to
another. External loads of various levels are connected to the parallel circuitry as a single-phase
electric generator.
Measurements were aimed at determining the efficiency of power generation gauged by the
output electricity when loaded by an external resistor with respect to what is put in to drive the
motor. Meanwhile, the heat dissipation was also monitored and found to be negligible snice the
temperature barely rose during operation, remaining in the range of 30 to 35oC. Magnetic loss
due to the iron core of the rotor is also found to be minimal as judged by the negligible hysteresis
loop measured by a magnetometer according to the looped magnetization as a function of magnetic field cycled over 5 quadrants.
Impedance analysis of each coil in operation was conducted through the I(t) vs V(t) time
functions in comparison with the static values measured from an LCR meter. This helps give a
glimpse of the mutual inductance of the coupling among coil windings on the stator or the rotor.
The efficiency of the generator is motor specific and the test outcome shows that only with the
rotor running at 2400 rpm can the optimal efficiency be achieved. As this work was confined to a
generator made by the industry with a specific aim, why this speed gives the best efficiency in relation to the coil designs is unclear and will be a matter of future study.
目次 Table of Contents
論文審定書+i
摘要+ii
Abstract+iii
目錄+v
圖目錄+vii
表目錄+x
第一章 緒論+1
1-1 前言+1
1-2 發電機的介紹+1
1-3 八極發電機的特性及應用+5
第二章 實驗儀器及理論基礎+12
2-1 發電機系統及原理結構+12
2-1-1 發電機原理結構+12
火力發電+12
水力發電+13
核能發電+13
2-1-2 發電機系統+14
2-2 超導量子干涉儀(SQUID)+15
2-2-1 超導量子干涉儀原理+15
超導體特性+15
約瑟夫森效應+16
超導量子干涉儀+17
2-2-2 磁性之分析+17
鐵磁性+17
順磁性+18
反磁性+19
2-3 電性量測+19
2-3-1 示波器+19
2-3-2 能量轉換效率+20
2-3-3 LCR錶+21
第三章 實驗設計+22
第四章 實驗結果與分析+24
4-1 能量轉換效率+24
4-1-1 負載對轉換效率的關係及溫度+24
4-1-2 馬力對轉換效率的關係+27
4-1-3 轉速對轉換效率的關係+28
4-2 定子轉子矽鋼片磁性分析+31
4-3 發電機輸出波形分析+34
4-3-1 LCR量測結果+34
4-3-2 自動電壓調整器勵磁波形+37
4-3-3 耦合式變壓器勵磁波形分析+39
4-3-4 耦合式變壓器勵I-V圖+43
第五章 結論+47
參考文獻+48
參考文獻 References
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